Assignee: Maschinenfabrik Reinhausen GmbH

Location: Regensburg, DE
No. of patents: 57

Number	Title	Issue Date
8119939	On-load tap changer with an energy storage mechanism The invention relates to an on-load tap changer having an energy storage mechanism for changing over, without any interruptions, between different winding taps of a tap-changing transformer on load. According to the invention, the energy storage mechanism has one or...	02/21/2012
8030583	Switching arrangement The invention relates to a switching arrangement with two operational settings for switching over a winding during transformer operation, wherein during the switching-over a transient current commutates from one current path to another current path. In that case fix...	10/04/2011
7833312	Method of drying an air dehumidifier The invention relates to a method for controlling a heatable dehumidifier. The heating of the dehumidifier is to be actuated only when several congruent time windows within which a temperature gradient is greater than or equal to 0 could be determined during a certa...	11/16/2010
7683282	Mechanical switching contact The invention relates to a mechanical switching contact having an insulating material support (1), on which fixed contacts (4, 5, 6) are arranged. Furthermore, a switching lever (2) is mounted such that it can rotate on the insulating material s...	03/23/2010
7656138	Device for regulating electrical voltage An apparatus for regulating electrical voltage in multiphase power mains has a control transformer having for each phase of the power mains a primary winding and a control winding having three taps. The second tap is connected centrally between the first and third t...	02/02/2010
7652218	Energy store The invention relates to an energy store for a load tap changer with a longitudinally movable lifting carriage and an also longitudinally movable snap-action carriage which follows the movement of the lifting carriage after being triggered and whose longitudinal mov...	01/26/2010
7622688	Tap changer A tap changer has an insulating housing and a plurality of annular arrays of contacts fixed in the housing. A vertical switching shaft in the housing carries contacts positioned to engage the fixed contacts of the respective array on rotation of the shaft. A tap-cha...	11/24/2009
7563310	Air dehumidifier for oil-insulated transformers, choke coils and steps switches A dehumidifier for an electrical-equipment air intake has an outer housing wall and a floor of a material with a high specific thermal conductivity downwardly closing the outer housing wall, having a downwardly tapering funnel-shaped inner surface formed with a cent...	07/21/2009
7552744	Decompression valve A pressure-relief valve has a flange formed with a throughgoing port. A spring plate spaced outward from the port is mounted on a rigid post fixing the spring plate relative to the flange. A valve body between the plate and the flange can shift between a closed posi...	06/30/2009
7550688	Tap changer having a switching monitoring device The invention relates to a tap changer having a switching monitoring device, which is arranged above the upper transmission stage in a housing. For monitoring purposes, two cam switches are provided which are actuated by a cam disk which is connected to the contact-...	06/23/2009
7518075	Energy accumulator The invention relates to a novel energy accumulator for a load step switch for rapid, continuous switching between various winding tappings. Said energy accumulator comprises a lifting carriage and a jumping carriage, which follow the movement of the jumping carriag...	04/14/2009
7497745	Contact arrangement A contact arrangement for use on an insulating rod having an upper fastening bore and a lower fastening bore has a U-shaped contact having a pair of limbs each formed with an upper bore and a lower bore. The contact is fittable around the rod with the limbs flanking...	03/03/2009
7463010	Multipoint switch The invention relates to a multipoint switch for continuously switching different coil branches of a step-down transformer. According to said invention, at least one torque motor associated to various drive configurations carries out different driving functions for ...	12/09/2008
7449851	Arrangement for automatically influencing a mains supply and motor drive therefor The invention relates to an arrangement for automatically influencing a mains supply. A voltage transformer is provided as a pilot transformer which detects the real value of the voltage which is to be adjusted and which transmits said value to a motor drive via an ...	11/11/2008
7191648	Level gauge for oil-filled transformer, choke, or tap changer An electric power apparatus has a oil-filled vessel in which a float is connected to a float shaft that rotates as the float rises and falls with the level of oil. A level indicator has a display shaft extending along and pivotal about an axis, and coupled to the fl...	03/20/2007
7179369	Oil filter system The invention relates to an oil filter installation for cleaning or cleaning and dessication of the oil in a tap changer at a power transformer or a plunger core coil, wherein a measuring device for detecting the volume flow of the throughflowing oil is provided and...	02/20/2007
6998547	On-load tap changer for a sequence switch A load changeover switch for a tap changer with two permanent main contact pairs for each phase to be switched, wherein the fixed contacts thereof are each time bridged over by a movable permanent main contact. The fixed permanent main contacts consist of a pluralit...	02/14/2006
6965217	Tap changing assembly for power transformer A tap changing assembly for power transformers having vacuum interrupters each of which is associated with a radio interrogated surface wave sensor capable of detecting whether the respective vacuum interrupter opens circuit in a timely manner. The sensors are inter...	11/15/2005
6856122	Thyristor tap changer A thyristor transformer has a mechanical tap selector and a diverter switch with thyristors. The tap selector is mounted in the oil-filled housing or tank of the transformer and the diverter switch is mounted in a separate housing laterally attached to the tank....	02/15/2005
6849813	Step switch with selector The invention relates to a tap selector switch with a preselector for uninterrupted switching-over between different winding taps of a tapped transformer. The entire selector is in that case accommodated as a separate assembly in an own insulating material housing, ...	02/01/2005
6838629	Energy accumulator for a sequence switch A force-storing unit for a tap changer has an output shaft journaled in a support and a pair of parallel guide rods fixed on the support, defining a longitudinal direction, and spaced parallel to the shaft. A force-storing slide and an output part are displaceable l...	01/04/2005
6822218	Method of and apparatus for wavelength detection A reflected light from a Bragg grating in an electrical transformer or other apparatus at which temperature is to be measured, is positioned by an optocoupler through a second fiber provided with a second Bragg grating whose reflection wavelength is different from t...	11/23/2004
6740831	Mechanical switching contact The invention relates to a mechanical switching contact for bipolar commutation comprising an insulating support having fixed contacts disposed therein. Said contacts are switchable by means of a contact carrier which possesses a pivoting arm on the free end and the...	05/25/2004
6529858	Method of controlling step switches A method of controlling a step switch. From the measured values of current, voltage and phase angle at an electric drive motor during actuation of the step switch the individual picked-up active output is calculated. From the active output the correspondi...	03/04/2003
6495779	Contact assembly on a preselector The invention relates to a contact assembly mounted on a preselector of a step switch, where the fixed preselector contact has a contacting ring that can be interconnected. The appropriate design of the contact and of the openings in an insulating materia...	12/17/2002
6350056	Method for fiber optic temperature measurement and fiber optic temperature sensor Fiber optic temperature measurement, especially for electric power equipment is effected utilizing, as the sensor, a portion of an optical fiber from which the coating has been removed and to which a glass capillary has been bonded by an adhesive. The mea...	02/26/2002
6347615	Damper for tap-changer vacuum switch A tap-changer vacuum switch having an actuating rod extending and displaceable along an axis is provided with a damper having a damper housing offset from and fixed relative to the vacuum switch, and a rod piston fixed on the valve-actuating rod, in the d...	02/19/2002
6307283	Position signalling device for a motor drive A position indicator for step switches and tap selectors of transformers and the like has a contact array connected to the motor drive and connected by a plug to the plug of a connector which, in turn, is connected by plugs to the information-generating m...	10/23/2001
6299762	Oil-filter assembly An oil-filter assembly has an upwardly open can generally centered on an upright axis and having at an upper rim a mounting ring having in turn an axially upwardly directed annular seal surface and, offset axially downward therefrom, an annular upwardly d...	10/09/2001
6234106	Position indicator A position indicator for a motor drive for actuating a step switch, tap changer, or dipping coil, has a display board having front and back faces and a first circular array of symbols on the front face corresponding to individual switching phases traverse...	05/22/2001
6224255	Temperature pickup for oil-filled vessels and temperature measurement method A temperature pickup for an oil-filled transformer or tap changer has within a resistance thermometer standard housing, the circuitry for duty-factor-modulated output of a measurement signal, interference circuitry which can slur the resulting wave form a...	05/01/2001
6124726	Method of monitoring a tap selector A tap selector for a power transformer switchable under load is monitored by detecting the effective values of current and voltage of the drive motor of the tap changer. The power is calculated and from that the instantaneous torque and the latter is comp...	09/26/2000
6100674	Method of monitoring a tap changer A method of monitoring a tap changer in which measured values representing the status of the tap change operation are associated with positions of the tap changer and the position range or time range for the tap change is subdivided into partial intervals...	08/08/2000
6091032	Tap changer A tap changer has a bypass switch with a rotary pair of movable contacts engaging arc segmental fixed contacts of a length greater than the spacing between the movable contact which spacing is greater than the spacing between the fixed contacts of the byp...	07/18/2000
6087607	Position signalling device The invention relate to a position signaling layout for a motor drive which also serves to activate an on-load tap changer, an off-circuit tap changer or a plunger core coil. Position signaling devices of this kind detect the position at a given time of t...	07/11/2000
6060669	Tap selector A multiphase reactor-switching tap selector has a single geneva mechanism operating three shafts which traverse phase plates carrying all of the contacts and the vacuum switching cell and rapid release mechanism for each of the phases. The geneva mechanis...	05/09/2000
6008456	Load switch for a step switch A load switch has a housing, a pair of main contacts fixed in the housing, and a movable main contact pivotal on the housing between end positions in each of which it engages a respective one of the fixed contacts and through a middle position in which it...	12/28/1999
5834717	On-load tap changer of a step switch An on-load tap changer of a step switch has a force-storage unit which has a charging slide continuously movable by a bidirectionally rotatable drive shaft and an output part that when tripped suddenly follows the movement of the charging slide and rotate...	11/10/1998
5821716	Method of controlling a tap changer of a transformer A tap-changer transformer operated by the step-by-step principle in which its motor drive receives a signal to raise or lower the tap, has a voltage regulator in which the switching delay times and sensitivity values are freed matrix-like the respective t...	10/13/1998
5786552	Switching arrangement for load change-over switches of step switches and for selector switches The invention concerns a switching arrangement for load change-over switches of step switches and for selector switches, wherein two switching contacts movable in two directions are present. The first switching contact is in the form of a main switching c...	07/28/1998

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Assignee: Maschinenfabrik Reinhausen GmbH